[RFC PATCH] eventdev: adapter API to configure multiple Rx queues

[Shijith Thotton]

This RFC introduces a new API, rte_event_eth_rx_adapter_queues_add(),
designed to enhance the flexibility of configuring multiple Rx queues
in eventdev Rx adapter.

The existing rte_event_eth_rx_adapter_queue_add() API supports adding
multiple queues by specifying rx_queue_id = -1, but it lacks the ability
to apply specific configurations to each of the added queues.

The proposed API, rte_event_eth_rx_adapter_queues_add, addresses this
limitation by:

- Enabling users to specify an array of rx_queue_id values alongside
  individual configurations for each queue.

- Supporting a nb_rx_queues argument to define the number of queues to
  configure. When set to 0, the API applies a common configuration to
  all queues, similar to the existing rx_queue_id = -1 behavior.

This enhancement allows for more granular control when configuring
multiple Rx queues. Additionally, the API can act as a replacement for
the older API, offering both flexibility and improved functionality.

Signed-off-by: Shijith Thotton <sthotton at marvell.com>
---
 lib/eventdev/eventdev_pmd.h             | 34 +++++++++++++++++++++++++
 lib/eventdev/rte_event_eth_rx_adapter.h | 34 +++++++++++++++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/lib/eventdev/eventdev_pmd.h b/lib/eventdev/eventdev_pmd.h
index 36148f8d86..2e458a9779 100644
--- a/lib/eventdev/eventdev_pmd.h
+++ b/lib/eventdev/eventdev_pmd.h
@@ -25,6 +25,7 @@
 #include <rte_mbuf_dyn.h>
 
 #include "event_timer_adapter_pmd.h"
+#include "rte_event_eth_rx_adapter.h"
 #include "rte_eventdev.h"
 
 #ifdef __cplusplus
@@ -708,6 +709,37 @@ typedef int (*eventdev_eth_rx_adapter_queue_add_t)(
 		int32_t rx_queue_id,
 		const struct rte_event_eth_rx_adapter_queue_conf *queue_conf);
 
+/**
+ * Add ethernet Rx queues to event device. This callback is invoked if
+ * the caps returned from rte_eventdev_eth_rx_adapter_caps_get(, eth_port_id)
+ * has RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT set.
+ *
+ * @param dev
+ *   Event device pointer
+ *
+ * @param eth_dev
+ *   Ethernet device pointer
+ *
+ * @param rx_queue_id
+ *   Ethernet device receive queue index array
+ *
+ * @param queue_conf
+ *   Additional configuration structure array
+ *
+ * @param nb_rx_queues
+ *   Number of ethernet device receive queues
+ *
+ * @return
+ *   - 0: Success, ethernet receive queues added successfully.
+ *   - <0: Error code returned by the driver function.
+ */
+typedef int (*eventdev_eth_rx_adapter_queues_add_t)(
+		const struct rte_eventdev *dev,
+		const struct rte_eth_dev *eth_dev,
+		int32_t rx_queue_id[],
+		const struct rte_event_eth_rx_adapter_queue_conf queue_conf[],
+		uint16_t nb_rx_queues);
+
 /**
  * Delete ethernet Rx queues from event device. This callback is invoked if
  * the caps returned from eventdev_eth_rx_adapter_caps_get(, eth_port_id)
@@ -1578,6 +1610,8 @@ struct eventdev_ops {
 	/**< Get ethernet Rx adapter capabilities */
 	eventdev_eth_rx_adapter_queue_add_t eth_rx_adapter_queue_add;
 	/**< Add Rx queues to ethernet Rx adapter */
+	eventdev_eth_rx_adapter_queues_add_t eth_rx_adapter_queues_add;
+	/**< Add Rx queues to ethernet Rx adapter */
 	eventdev_eth_rx_adapter_queue_del_t eth_rx_adapter_queue_del;
 	/**< Delete Rx queues from ethernet Rx adapter */
 	eventdev_eth_rx_adapter_queue_conf_get_t eth_rx_adapter_queue_conf_get;
diff --git a/lib/eventdev/rte_event_eth_rx_adapter.h b/lib/eventdev/rte_event_eth_rx_adapter.h
index 9237e198a7..9a5c560b67 100644
--- a/lib/eventdev/rte_event_eth_rx_adapter.h
+++ b/lib/eventdev/rte_event_eth_rx_adapter.h
@@ -553,6 +553,40 @@ int rte_event_eth_rx_adapter_queue_add(uint8_t id,
 			int32_t rx_queue_id,
 			const struct rte_event_eth_rx_adapter_queue_conf *conf);
 
+/**
+ * Add multiple receive queues to an event adapter.
+ *
+ * @param id
+ *  Adapter identifier.
+ *
+ * @param eth_dev_id
+ *  Port identifier of Ethernet device.
+ *
+ * @param rx_queue_id
+ *  Array of Ethernet device receive queue indices.
+ *  If nb_rx_queues is 0, then rx_queue_id is ignored.
+ *
+ * @param conf
+ *  Array of additional configuration structures of type
+ *  *rte_event_eth_rx_adapter_queue_conf*. conf[i] is used for rx_queue_id[i].
+ *  If nb_rx_queues is 0, then conf[0] is used for all Rx queues.
+ *
+ * @param nb_rx_queues
+ *  Number of receive queues to add.
+ *  If nb_rx_queues is 0, then all Rx queues configured for
+ *  the device are added with the same configuration in conf[0].
+ * @see RTE_EVENT_ETH_RX_ADAPTER_CAP_MULTI_EVENTQ
+ *
+ * @return
+ *  - 0: Success, Receive queues added correctly.
+ *  - <0: Error code on failure.
+ */
+__rte_experimental
+int rte_event_eth_rx_adapter_queues_add(
+			uint8_t id, uint16_t eth_dev_id, int32_t rx_queue_id[],
+			const struct rte_event_eth_rx_adapter_queue_conf conf[],
+			uint16_t nb_rx_queues);
+
 /**
  * Delete receive queue from an event adapter.
  *
-- 
2.25.1